Improvement in tube-brushes



A. W. ABRAMS.

TUBE-BRUSH.

Patented Feb. .13, 1877.

No. 187.341v

NPETEHS, PHOTOJLIHOGRAPHER. WASHINGTON. D Q

ADDISON W. ABRAMS, OF SPRINGFIELD, MASSACHUSETTS.

IMPROVEMENT IN TUBE-BRUSHES.

Specification forming part of Letters Patent No. 187,345, dated February13, 1877; application filed October 20, 1876.

To all whom it may concern Be it known that I, ADDISON W. ABRAMS, ofSpringfield, in the county of Hampden, State of Massachusetts, haveinvented a novel Improvement in Cube-Brushes, of which the following isa specification, reference being bad to the accompanying drawings,making part of this specification, in which- Figure 1 represents alongitudinal plan View. Fig. 2 is a longitudinal vertical view and across-section at 00.

The object of myinvention is to improve upon a boiler-flue cleaner onwhich a patent was granted to me May 11, 1875, No. 163,129,

and my invention consists in casting on the tapering ends of thesectional bristle-holder longitudinal ribs, which fit into grooves castin the inside of the tapering countersinks within the end cones, so thatwhen the cones are forced together in the act of expanding the brush,there shall be no torsion of the sections of the brush-holder, and notwisting strain, but only a true lateral pressure on the ends.

In order that those skilled in the art may make and use my invention, Iwill proceed to describe the manner in which I have carried it out.

In the said drawings, A is the central rod on which are arranged theclamping devices or cones D D, provided with the internal taperingcountersinks E tovreceive the tapering are cast grooves J J, into whichfit longitudinal ribs G G on the tapering ends of the three longitudinalsectional bristle-holders. The movements of the cones D D are controlledby means of the nut C. When the nut O is screwed against the cone D, thetendency would be, in the absence of the ribs G and grooves J, tor theedges of the sections to ride over one another, and make an unequalexpansion by the yielding to the twisting strain--the bristle-holderbeing inelastic. And after being expanded to a particular point to fit atube, the cleaner is rigid, not yielding to, but removing any obstaclein, the tube.

The advantage in constructing the bristleholder in three pieces is thatin expanding it the bristles remain much nearer a true circle, and donot assume a decidedly elliptical form,

as when the holder is in only two longitudinal sections.

Having thus described my iuvention,-what I claim as new, and desire tosecure by Let ters Patent, is

ln a boiler-tube cleaner, the rigid sectional bristle-holder having ribsG, in combination with cones D, provided with internal taperingcountersinks, having grooves J, to receive said ribs G, substantially asdescribed.

ADDISON W. ABRAMS. Witnesses:

JOSEPH M. Ross,

STEPHEN E. SEYMOUR.

